431 Stainless Steel Round Bar

431 Stainless Steel Round Bar

431 stainless steel round bar containing NI CR steel, through heat treatment can obtain high mechanical properties, corrosion resistance is better than 410 steel and 430 steel. 431 stainless steel corresponds to China 1cr17ni2, Japan JIS SUS431. Chemical composition C:≤0.20 Mn:≤1.00 Si:≤1.00...
Product description

431 stainless steel round bar containing NI CR steel, through heat treatment can obtain high mechanical properties, corrosion resistance is better than 410 steel and 430 steel. 431 stainless steel corresponds to China 1cr17ni2, Japan JIS SUS431.


Chemical Composition(%)

C  ≤ 0.20  

Mn ≤ 1.00  

Si ≤ 1.00  

Cr: 15.0~17.0  

Ni: 1.25~2.50  

P ≤ 0.04  

S ≤ 0.03 


Tensile Strength σb (MPa): Quenching and Tempering, ≥1080

Elongation rate δ5 (%): Quenching and Tempering, ≥10,

Impact Power AKV (J): Quenching and Tempering, ≥39

Hardness: annealing, ≤285HB



Heat Treatment Specification

1) annealing, 680~700℃ high-temperature tempering air cooling;

2) quenching, 950~1050℃ oil cold;

3) Tempering 275~350℃ air cold.


Metallographic Structure: The organization characteristic is the martensite body shape.


Delivery Status: Generally in the state of heat treatment delivery, the type of heat treatment in the contract is noted;


431 belongs to martensitic stainless steel, with high carbon content containing trace nickel elements so that it will have magnetism. Non-magnetic or weak magnetic stainless steel is called austenitic stainless steel, austenitic stainless steel core elements are nickel, as long as the nickel content reached a certain standard when the stainless steel will show no magnetic or weak magnetic, austenitic stainless steel with the lowest nickel content of a brand of 201 carbon content is only 3.5%~5.5%, The highest nickel content is 904L with a nickel content of 19%~23%.


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